So I was hit with an APMA3 earlier today after winning an arena battle but before the victory screen appeared. Figuring I would take a loss and frustrated I tossed my phone at my couch and walked away.
Came back a few minutes later and the game was still locked up so I force closed and restarted. To my surprise my win streak was intact and I was given a victory for the match.
Had it happen 2 more times and waited a minute or 2 before force closing and again was awarded victories.
Could be coincidence but seems that if u give it a little time after getting the error before force closing the data just might reach the server.
Figured I'd share in case anyone wants to try.